package com.atguigu.yygh.common.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;


import java.lang.reflect.Method;
import java.time.Duration;

import org.springframework.cache.CacheManager;
import org.springframework.cache.annotation.EnableCaching;
import org.springframework.cache.interceptor.KeyGenerator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.RedisSerializationContext;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;

@Configuration
@EnableCaching
public class RedisConfig {
	
	   

	    @Bean(name = "redisTemplate")
	    public RedisTemplate<String, String> redisTemplate(RedisConnectionFactory factory) {
	        RedisTemplate<String, String> template = new RedisTemplate<>();
	        ObjectMapper om = new ObjectMapper();
	        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
	        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
	        RedisSerializer stringSerializer = new StringRedisSerializer();
	        template.setKeySerializer(stringSerializer);
	        template.setValueSerializer(stringSerializer);
	        template.setHashKeySerializer(stringSerializer);
	        template.setHashValueSerializer(stringSerializer);
	        template.setConnectionFactory(factory);
	        return template;
	    }

	    @Bean(name = "keyGenerator")
	    /** cache key generation strategy 
	     * 自定义 key 规则 
	     */
	    public KeyGenerator KeyGenerator() {
	        return new KeyGenerator() {
	            @Override
	            public Object generate(Object target, Method method, Object... params) {
	                StringBuilder sb = new StringBuilder();
	                sb.append(target.getClass().getName());
	                sb.append(method.getName());
	                for (Object obj : params) {
	                    sb.append(obj.toString());
	                }
	                return sb.toString();
	            }
	        };
	    }

	    @Bean
	    /**  redis-cache configuration */
	    public CacheManager cacheManager(RedisConnectionFactory factory) {
	        RedisSerializer<String> redisSerializer = new StringRedisSerializer();
	        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);

	        //解决查询缓存转换异常的问题
	        ObjectMapper om = new ObjectMapper();
	        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
	        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
	        jackson2JsonRedisSerializer.setObjectMapper(om);

	        // 配置序列化（解决乱码的问题）
	        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
	                // 7 天缓存过期
	                .entryTtl(Duration.ofDays(7))
	                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
	                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
	                .disableCachingNullValues();

	        RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
	                .cacheDefaults(config)
	                .build();
	        return cacheManager;
	    }
}

